... ASTM A 554 and others.Features:1) Material of stainless steel: grade: AISI 201, 304 4302) Applied field: construction upholstery, and industry instruments ... , 12.7,14.5, 15.9, 17,18,19,20,22,23,28,29, 31.8 ,35,36,38,45, 47 ... service: Other specifications can be manufactured according to customers' requirements 304 Stainless Steel Pipe